Page 233 - Power Quality in Electrical Systems

Index

AC contactors and relays, 165–170 Batteries, 133, 138–139
correction methods for, 169–170 in double-conversion UPS, 129
operation of, 165–168 flooded, lead acid, 138, 139
power quality events affecting, hot swappable, 134, 191
165–170 VRLA batteries, 139
voltage disturbance and, 168–169 Battery chargers, 133
Accuracy, 5 Battery-inverter UPS, 119, 120
Active harmonic filters, 95–97, 119 B/H curves, 72
Adjustable speed drives (ASDs), Boost converters, 101–104, 186
177–188 Bridge rectifiers, three-phase, 4
applications of, 178–179 Bulk power, 110
disturbances affecting, 180–181 “Burden” (resistive load), 207
harmonic filters for, 86 By-pass circuits, 129, 130, 133
line current for, 73–74 By-pass transfer switches, 198
protection of, 183–188
rectifier of, 178 Cables, fiberoptles, 10
voltage unbalance affecting, California Energy Commission
181–183 (see Switch mode power supplies)
AFCs (alkaline fuel cells), 142 Capacitor banks:
Airgap fields, reverse-rotating, 42 harmonics affecting, 44
Alkaline fuel cells (AFCs), 142 switching, 34–35
Allen-Bradley 1609-P UPS, 134 CBEMA curves (see Computer Business
American National Standards Institute Equipment Manufacturers
(ANSI) Standard C64, 17–18 Association)
Amplitude variation, in three-phase Chargers, for batteries, 133
rectifiers, 40 Circuit(s):
Analysis methods, 155–156 by-pass, 129, 130, 133
Analyzers, power-quality, 205, 206 switching, 5, 95
ANSI Standard C64, 17–18 Circuit breakers:
Arc furnaces, 39 in E/G set, 197
Area power, 110 harmonics affecting, 44
ASD (see Adjustable speed drives) CISPR (see International Special
Automated voltage regulator (AVR), 134 Committee on Radio Interference)
Automatic data processing, 156 Clearing, fault, 1
Automatic electromechanical transfer Commercial dynamic voltage
switches, 198 compensators, 153–154
Availability, “five nines” (99.999 percent), Commercially available UPSs, 133–137
113 Commutation:
AVR (automated voltage regulator), current, 8
134 in rectifiers, 35

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